Roof structure



July 16, 1957 L. w. JAEGER ROOF STRUCTURE Filed Dec. 24, 1954 y@ 1.a@Mm" J a-gaaf JNVENICR.

' ATTORNEYS 2,799,232 ROOF STRUCTURE -Leon W. Jaeger, Buffalo, N. Y.Application December 24, 1954, Seal No. 477,517 2 Claims. (Cl. Hi8-13)This invention relates to a roof structure and method of fabricating thesame, and more particularly to a lroof structure having conventionalpurlins, longitudinally corrugated metal roof sheets supported upon saidpurlins and extending crosswise or at right angles to the purlins, and alayer of insulation batts between the purlins and the corrugated metalroof sheets and running transversely of the purlins and with their edgesin substantially abutting relation to one another and lwith theirabutting edges in register with the spaces provided by corrugations inthe roof panels.

The invention is directed to providing in such a roof structure membersfor bridging and supporting from their undersides, between the purlins,the abutting edges of the insulation batts.

One of the primary objects of the invention is to provide such supportfor these abutting edges of insulation batts which will not deteriorate,loosen or work away from their proper supporting position and willcontinue to support and also concealthese abutting edges for anindefinite period of time.

Another object of the present invention is to provide i such supportswhich are in the form :of simple metal strips which can be quicklyplaced in position and do not require any adhesive or fasteners toretain them in position.

Another important object of the invention is to provide such supportswhich are attractive in appearance, the strips imparting a sort ofpillowed or quilted effect to the ceiling `of the Astructure by virtueof both the .purlins and the supports `being in compressive relationwith the ybatts and dividing the insulation into rectangles pressedupwardly at their edges.

Another object of the invention is to provide such members which can bevery easily and quickly placed in position by one having little skill.

Another object is to provide such supports which are very low in cost.

Other objects and advantages of the invention will be apparent from thefollowing description and drawings in which:

Fig. l is a fragmentary, vertical section through a roof structureembodying the present invention, the section being taken on line 1-1 atright angles to the purlins or parallel with the supporting trusses orbeams.

Fig. 2 is a fragmentary, vertical section taken on line 2-2 Fig. l.

Fig. 3 is a fragmentary, on line 3 3 Fig. l.

Fig. 4 is a fragmentary, perspective view of one end of the corrugatedroof sheets forming part of the roof structure.

Fig. 5 is a perspective view of one of the longitudinally corrugatedstrips forming part of the roof structure embodying the presentinvention.

The invention is illustrated as embodied in a metal roof having theconventional trusses which are shown as being in the form of taperingI-beams inclined to vertical section taken generally nited StatesPatent-O Patented July 16, 1957 provide the desired pitch to the roof.On the upper flanges of these trusses 10 are secured purlins 11 whichare uniformly spaced in horizontal rows ascending the trusses 10. Eachpurlin is shown as being of S-shape in cross section having a `centralweb 12, a bottom flange 13 extending from the web on one side thereofand having a reversely extending reinforcing bead or flange 14, and thepurlin also having an upper flange 15 extending from the side of the web12 opposite the llange 13 and also terminating in a reversely formedreinforcing bead or flange 16.

Before the roofing is applied, batts 20 of insulation are laid inedge-to-edge relation up ,and down the roof structure transversely ofand upon the purlins 11. Each of these batts comprises a body 21 offiber glass, rock wool, or other fibrous insulation having an upper face22 and an under face 23 this latter face forming the exposed ceiling vofthereof structure. The opposite edges 24 of the batts are laid inabutting relation to one another.

After the batts 220 `have been so laid in edge-to-edge relation, thesheet metal roofing is applied. This sheet metal roofing is shown ascomprising a plurality of interfitted metal ysheets v25 which can bemade of aluminum or galvanized or otherwise protected steel and aresho-wn as having -a llongitudinally extending central corrugation 26 andtwo marginal corrugations 28, the corrugations all projecting .upwardlyfrom the sheet. These metal sheets 25 are fastened to the purlins 11 bybolts, rivets, screws or nails (not shown) and compress the batts 20against the purlins. As best shown in Fig. 2, the marginal corrugationsof the successivey sheets 25 are adapted to be interitted and provideridges in the roof through which water cannot vpass without having ahead higher than the height of the ridge. Further, to secure againstleakage through these ridges, the overlapped marginal corrugations 2S ofthe several sheets can be bolted together at their crests, .such boltsbeing illustrated at 29, and each having a nut 30 arranged Awithin theoverlapped corrugation or ridge. It 4will :particularly be observed thataccess `to the shank of the bolts 29 for the purpose of applying its nut30 can be had through the crack between the .abutting edges 24 of thebatts 20. Thus, in order lto :apply 'the nuts 30 to the bolts 29, whichhave been previously inserted downwardly through the overlapped marginalcorrugations 28, it is merely necessary for the operator to spread theadjacent edges of the batts 20, apply the nut 30 to the bolt, andtighten the same.

A roof constructed as above described is not entirely satisfactory forthe reason that the cracks between the abutting edges 24 of the manyinsulation batts 20 are exposed on the underside or ceiling of the roofto the interior of the building. In laying these batts, it is impossibleto have all of these abutting edges 24 snugly fitted together and,accordingly, open cracks are bound to occur through the layer of roofinsulation at intervals. Warm air can, of course, escape through thesecracks to be chilled by direct contact with the overlapped corru*gations 2S following which the cold air settles back into the enclosure.This, of course, represents a thermal loss and decrease in eiciency ofthe insulation. Also, the open cracks provide crevices for harboringinsects and furthermore look unsightly, especially where some of theedges droop more than others.

It is the object of the present invention to overcome thesedisadvantages by the provision of very simple, easily applied, reliablyheld and loW cost supports.

In the practice of the present invention, the metal strips 35illustrated in perspective in Fig. 5 are provided. These strips are madeof sheet metal and can be of the same composition as the roof sheets 25.It is important that the length of these strips be slightly greater thanthe spacing of the several purlins 11 and that this length the strip beoiset laterally from the major plane of the strip and preferably in adirection opposite to that of the corrugation 36.

With a plurality of such strips 35 as illustrated in Fig. 5, the roofvstructure embodying the present invention can be completed. At eachexposed crack between the abutting edges 24 of the batts 20, a strip 35is brought up between the corresponding purlins 11. Preferably,

jecting upwardly and one end of this strip is slipped into ythis stripis placed with its central corrugation 36 pror the crack between theabutting edges 24 and the top of v the top ilange 15 of thecorresponding purlin 11 from the side of this purlin opposite this topflange. This insertion of one end vof the plate 35 between the top of apurlin and the abutting edges 24 of the batts of insulation is permittedbecause directly above these abutting edges is disposed thecorresponding overlapped marginal corrugations 28 and which provide thespace into which the abutting edges of the insulation batts can bedisplaced, as best shown in Fig. 2.

The plate 35 is then moved endwise in the direction of its insertion ofthe purlin, as previously described, that is, upwardly or to the rightas viewed in Fig. l, until its opposite end clears the face of the web11 of the next succeeding lower purlin. With the tirst purlin as afulcrum, the strip 35 is then swung upwardly until its opposite end isdisposed above the top ange 15 of this next succeeding lower purlin. Themetal strip 35 is then moved longitudinally in the opposite direction,or downwardly across the upper face of the top flange 15 of this nextsucceeding lower purlin 11, so that both ends of the strip 35 aresandwiched between the two purlins and the two batts of insulation. Theopposite ends of the plates 35 are pressed against the purlins by theexpansive pressure of the compressed batts. Thisis, of course, repeatedat each exposed pair of abutting edges 24 of the batts 20.

It will be seen that the plates 35 can be very quickly placed inposition and that, when once placed in position, they are reliably heldin position by the pressure and friction of the upwardly displaced edges24 of the insulation batts. It will further be seen that the platesadequately seal and conceal these abutting edges and are of themselvespleasing in appearance, as well as provide pleasing pillowed or quiltedappearance to the underside or ceiling of the roof structure.

It will be further seen that these plates are very elective both insealing and concealing the otherwise exposed edges of the insulatedbatts and accomplish the various objectives previously set forth.

I claim:

l. In a roof structure having spaced purlins, longitudinally corrugatedmetal rooting sheets supported upon and secured to said purlins andextending transversely of said purlins, and insulation batts interposedand compressed between and in Contact with said purlins and corrugatedmetal roofing sheets and running parallel with the corrugations of saidroofing sheets with the longitudinal edges of said batts insubstantially abutting relation to one another and with said abuttingedges being in register with spaces provided by the upward projection ofsaid corrugations; the combination therewith of a plurality of membersfor bridging successive pairs of said purlins and supporting from theirundersides said abutting edges of said insulation batts, each of saidmembers comprising a strip provided with an upwardly extendinglongitudinal corrugation contained within a corresponding one of saidspaces and rendering each strip longitudinally rigid, and each of saidlongitudinally rigid strips being of substantially greater length thanwidth with said width being approximately equal to the width of saidspaces, and said length of each strip exceeding the distance betweensaid purlins, said strips being disposed below said spaces with theiropposite ends pressed against the upper faces of said purlins by theexpansive pressure of said compressed batts whereby said strips providerigid supports bridging the space between successive purlins andconcealing and supporting from their undersides said abutting edges ofsaid insulation batts.

2. A roof structure as set forth in claim l wherein said longitudinalcorrugation of each strip is arranged centrally of its strip and whereinthe opposite longitudinal edges of each strip is offset vertically toprovide beveled edges.

References Cited in the file of this patent FOREIGN PATENTS 258,124Great Britain of 1926 466,776 Great Britain of 1937 597,654 GreatBritain of 1948

